A 2011 Science paper produced by the HiRISE project explained how, on Mars, these objects can become destabilized by the sublimation of dry ice. Like yardangs and loess, they are produced via Aeolian processes, which include saltation, surface creep, and suspension. Types of these geologic objects include barkhans and draa, and both (*) "fossilized" ones and those that "move" are found in ergs. "Reversing" ones are formed where seasonal winds blow in different directions. For 10 points, name these large accumulations of sand.
A 2011 Science paper produced by the HiRISE project explained how, on Mars, these objects can become destabilized by the sublimation of dry ice. Like yardangs and loess, they are produced via Aeolian processes, which include saltation, surface creep, and suspension. Types of these geologic objects include barkhans and draa, and both (*) "fossilized" ones and those that "move" are found in ergs. "Reversing" ones are formed where seasonal winds blow in different directions. For 10 points, name these large accumulations of sand.
A 2011 Science paper produced by the HiRISE project explained how, on Mars, these objects can become destabilized by the sublimation of dry ice.
sand {dunes}